Stabilizer for solutions containing loosely-combined oxygen and process of making the same



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' a' eitizen: of the" Swiss Confederation, residducts, or more probably,

may mix 446.4 parts of sodium pyrophosing at Bachtoldstrasse'7, Zurich, Switzer:

land, have invented. new and useful I111- prov'ein'ents in Stabilizei's for Solutions Containing Loos'elysCombined Oxygen and Processes of'Making the Same, of which the following is: a specification.

The manufacture. of many stabilizers is known, in the most part they consist of simple salts, of which-a well ,known :one, as recommended by Dr. Sarason 1n U. S. A.

Letters Patent 1,00( ),298,. is sodium pyro-' phos hate.

.A or having carried out exhaustiye experiments I state, that I have found out by dissolving sodium pyrophosphate salicylic acid on the water'bath, continuing the heating. until dryness has been obtained. a compound of new and surprising properties which is sodium pyrophosphate salicylate and may perhaps have the ormula: coerce-cam C00-NaOoH| C0QNI ClH| QQONfl-CIH or .it' may have the formula that corresponds to any one of the intermediate products wherein one, two or three of the sodium atoms. femain associated with the. pyrophosphate group or a mixture of such prod-- 0 P/ 81% i (3H4 I \oNa i coon "As a specific example, but without limitin the invention thereto, I'may state that phate in 276.2'parts of salicylic acid moistoned with water, on, a water bath and heat to dryness asset f orth above.

Such a compoufi'dhas a stabilizing power ,on solutifons contaiil ingh lgosely combinecil ox gen or examp e, y r0 peroxi sodium 'peroxid', sodium 'rbo te, sodium poi-carbonate, and the 0, especially at temperatures over 7 5 C. that can not be ababove, as well as materials Applicationnled June 25, 1924. Serial No. 722416.

tained with pyrophosphate of sodium alone .or salicylic acid alone or-with any other products known at this time.

This compound is practical because of its solubility in ,water, whereas salicylic acid alone is difficultly soluble in water. Also sodium pyrophosphate has been mentioned as an example. wish it understood that potassium and similar, pyrophosphates may be used. a v

By the expression "pyrophosphate salicylate as used'herein and in the appended claims, I includesuch materials as are prepared according to the process set forth substantially identical therewith, pared.

Having. thus described m'y invention, I claim as new:

1. A stabilizer for permitting of; only slow liberation of oxygen in solutions containing loosely combined oxygen consistingof a soluble pyrophosphate salicylate.

2. A stabilizer for permitting of only slow libera-tion of'oxygen solutions containing loosely combined oxygen consistingof an alkali'metal pyrophosphate salicylate.

3. A stabilizer for permitting of only slowliberation of oxygen insolutions containing loosely combined oxygen consisting ofsodium pyrophosphate salicylate, I

4. The .rocess of making a stabilizer of i the lass escribed which comprises mixing sodl pyrophosphate inv salicylic acid and hea-ting to dryness on a water bath.

rocess of making a stabilizer of 5. The the class. escribed which comprises mixing 446.4 parts of sodium pyrophosphate in 276.2 parts of salicylic acid and heating to dryness on a water bath.

6. A stabilizer for 'permit-ting of only slow liberation of oxygen in solutions con- YGEN AND rnocnssno matter how, pretaining looselycombmed oxygen produced by mixing sodium pyrophosphate and salicylic acid and heating said mixture to dryness on a water both. i i

In testimony whereof I have signed my name to this specification. o

vIcToR WINTSCH,"'Ja. 

